Notably, Gallup found, independent approval has cratered 24 points (from 61%) since Biden took office and 18 points since June (55%). As high as Democratic approval is, the 90% does represent a low from the 98% high when he first took office.
https://www.newsmax.com/politics/gallup-approval-rating-democrats/2021/09/22/id/1037493/#insticator-commenting